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Texas Instruments LM4050BEM3-2.0/NOPB
- Part No.:
- LM4050BEM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050BEM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,796
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Product details
Overview
LM4050BEM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering 2.048 V ±0.2% (B-grade) at 25°C with 50 ppm/°C max temperature coefficient and 41 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA, supports capacitive loads without external capacitor, and targets high-accuracy analog signal conditioning in space-constrained systems.
For engineers reviewing the LM4050BEM3-2.0/NOPB datasheet, LM4050BEM3-2.0/NOPB pinout, LM4050BEM3-2.0/NOPB application, or LM4050BEM3-2.0/NOPB equivalent, key selection criteria include initial tolerance (±0.2%), low operating current headroom, thermal hysteresis (0.7 mV), long-term stability (120 ppm), and compatibility with battery-powered instrumentation requiring stable 2.048 V reference for 12-bit ADCs.
Technical Context
The LM4050BEM3-2.0/NOPB uses bandgap-derived Zener-zap trimmed reverse breakdown voltage with curvature-corrected temperature drift compensation. Its shunt architecture requires an external series resistor to set operating current, enabling direct replacement of traditional Zener diodes while improving accuracy and stability.
It features low dynamic impedance (0.3 Ω at 1 mA), tolerates unlimited capacitive loading, and maintains regulation across −40°C to +85°C industrial temperature range. No output capacitor is required, and stability is guaranteed under all load conditions due to internal compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit ADC full-scale calibration (e.g., 2.048 V = 4096 × 0.5 mV LSB) |
| Initial Tolerance | ±0.2% at 25°C (B-grade); ensures ≤±4.1 mV absolute error before temperature or aging effects |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +85°C; contributes ≤±6.5 mV drift across full industrial range |
| Min Operating Current | 60 μA at 25°C; allows ultra-low-power operation in sleep-mode sensor nodes |
| Max Operating Current | 15 mA; supports high-current reference buffering or multiple downstream loads |
| Output Noise | 41 μVrms (10 Hz–10 kHz); limits added noise to <0.01 LSB in 16-bit 2.048 V-range systems |
| Long-Term Stability | 120 ppm after 1000 hrs; corresponds to ~0.25 mV drift over 1 year under bias |
Pinout & Package
SOT-23 (DBZ) package, 2.92 mm × 1.30 mm body size, surface-mount, 3-pin configuration with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated voltage rail; sinks current from external resistor; sets reference potential |
| Anode (Pin 2) | Common return / ground reference | Must be connected to system ground; defines 0 V reference for cathode voltage |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or component required; avoids unintended coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Eliminates BOM cost and board area for stabilization cap; simplifies layout in wearables and portable medical sensors |
| Tolerates capacitive loads | Stable with >100 nF output capacitance; enables direct driving of SAR ADC sample-and-hold inputs |
| Fixed 2.048 V output | Matches standard 12-bit DAC/ADC full-scale codes (4096 × 0.5 mV); eliminates scaling resistors in data acquisition front-ends |
| Low 41 μVrms noise | Preserves SNR in precision measurement chains; avoids need for post-regulator filtering in audio-grade analog paths |
| 60 μA min operating current | Enables operation from high-value current-limiting resistors (e.g., 1 MΩ @ 3.3 V), reducing quiescent power in always-on IoT nodes |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and battery-powered operation. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 2.048 V reference for ADC conversion and DMM autoranging circuitry. Use Value: ±0.2% initial accuracy and 50 ppm/°C TC ensure <0.1% measurement error across 0–40°C ambient without calibration. |
Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and successive-approximation ADC. Use Value: 41 μVrms noise and 120 ppm long-term stability maintain ≥14.5 ENOB over 5-year field deployment. |
| Energy Monitoring Sensors | Precision Audio Signal Chains |
Use Scenario: Smart electricity meter using isolated current sensing and metrology-grade ADC. IC Role / Device Role / Timing Role: Primary voltage reference for anti-aliasing filter biasing and ADC reference in Class 0.2 metering ICs. Use Value: 60 μA minimum current enables direct use with high-impedance isolation amplifiers, minimizing power loss in auxiliary supplies. |
Use Scenario: High-fidelity audio ADC front-end in studio interface with 24-bit resolution. IC Role / Device Role / Timing Role: Low-noise reference for microphone preamp gain-setting and ADC reference in dual-supply signal path. Use Value: 0.7 mV thermal hysteresis prevents audible "popping" during thermal cycling; 2.048 V matches common digital audio word lengths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.5 V reference (2.495 V ±1%); higher 2 mA min current; 200 ppm/°C TC | Requires two external resistors for 2.048 V setting; unsuitable for ultra-low-power or high-accuracy metrology | Select only if adjustable output and cost sensitivity outweigh accuracy and current requirements |
| REF3020AIDBZR | 2.048 V series reference; 50 ppm/°C TC; 42 μVrms noise; but requires 50 μA supply current + load current | Higher quiescent power; needs output capacitor; incompatible with shunt-based bias networks | Prefer when sourcing (not sinking) current is mandatory, e.g., in op-amp reference buffers with ground-referenced inputs |
Compared with TL431CDBZR and REF3020AIDBZR, LM4050BEM3-2.0/NOPB uniquely combines fixed 2.048 V, 60 μA min current, and zero-output-capacitor operation-making it optimal for space- and power-constrained shunt reference designs where precision and simplicity are co-prioritized.
Availability
LM4050BEM3-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy monitoring sensors requiring stable component supply with guaranteed long-term continuity and TI-authorized traceability.
Supply support for LM4050BEM3-2.0/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs.
The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement applications-including portable test equipment, industrial sensors, and automotive subsystems.
FAQ
What is the exact output voltage and tolerance of LM4050BEM3-2.0/NOPB at 25°C?
The LM4050BEM3-2.0/NOPB has a nominal output voltage of 2.048 V with a maximum initial tolerance of ±0.2% at 25°C (B-grade specification). This corresponds to a guaranteed range of 2.0439 V to 2.0521 V under standard test conditions (IR = 100 μA), as confirmed in Section 6.5 of the SNOS455G datasheet.
Does LM4050BEM3-2.0/NOPB require an external output capacitor for stability?
No, the LM4050BEM3-2.0/NOPB does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC sample capacitors or long PCB traces - a key differentiator from older shunt references like the TL431.
What is the minimum operating current for LM4050BEM3-2.0/NOPB across temperature?
The LM4050BEM3-2.0/NOPB requires a minimum operating current of 60 μA at 25°C, increasing to 65 μA across the full industrial temperature range (−40°C to +85°C), as specified in Table 6.5 of the datasheet. Below this current, regulation is not guaranteed.
Can LM4050BEM3-2.0/NOPB be used in automotive applications?
The LM4050BEM3-2.0/NOPB is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, TI offers the pin-compatible LM4050BEM3-2.0/NOPB-Q1 variant (LM4050-N-Q1 family), which is AEC-Q100 Grade 1 qualified and tested to −40°C to +125°C junction temperature.
What is the thermal hysteresis performance of LM4050BEM3-2.0/NOPB?
The LM4050BEM3-2.0/NOPB exhibits a thermal hysteresis of 0.7 mV maximum, defined as the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C. This low hysteresis supports repeatable measurements in thermally cycled environments such as outdoor sensor enclosures.
LM4050BEM3-2.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 34µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050BEM3-2.0/NOPB FAQ
1.How can I place an order for LM4050BEM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050BEM3-2.0/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM4050BEM3-2.0/NOPB reliable?
The price and inventory of LM4050BEM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050BEM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4050BEM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050BEM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050BEM3-2.0/NOPB?
LM4050BEM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050BEM3-2.0/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM4050BEM3-2.0/NOPB?
For technical support, including LM4050BEM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050BEM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4050BEM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4050BEM3-2.0/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM4050BEM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4050BEM3-2.0/NOPB?
All LM4050BEM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4050BEM3-2.0/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM4050BEM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4050BEM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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